Automobile Engineering in ME
The function of a proportioning control valve (PCV) in a brake system is to

Reduce the brake fluid pressure when the brakes approach their lockup point
Cause less brake fluid pressure to act on the rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level
Ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation
Cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level

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Automobile Engineering in ME
In which of the following conditions, the idle CO percentage should be measured with the vehicle?

Headlights and other electrical devices are switched on
Headlights are switched on
Headlights and other lights are switched off
Headlights and other electrical devices are switched off

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Automobile Engineering in ME
The basic purpose of a four wheel drive (4WD) system is that it

Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces
Ensures that effective braking can be performed, even on slippery surfaces
Delivers improved cornering on dry road surfaces
Eliminates the need of snow tyres, tyre chains, etc.

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